Fails to compile with GOOS=linux, GOARCH=386

[ipsi]

I'm not sure if you're intentionally avoiding 32-bit systems, but if I compile an application using go-ora with the flags GOOS=linux GOARCH=386, I get the following error:

# github.com/sijms/go-ora/advanced_nego
../../../../go/pkg/mod/github.com/sijms/go-ora@v0.0.0-20210313181832-b64036f0a8e4/advanced_nego/advanced_nego.go:40:9: constant 3735928559 overflows int
../../../../go/pkg/mod/github.com/sijms/go-ora@v0.0.0-20210313181832-b64036f0a8e4/advanced_nego/advanced_nego.go:120:17: constant 3735928559 overflows int
../../../../go/pkg/mod/github.com/sijms/go-ora@v0.0.0-20210313181832-b64036f0a8e4/advanced_nego/supervisor_service.go:60:10: constant 3735928559 overflows int
../../../../go/pkg/mod/github.com/sijms/go-ora@v0.0.0-20210313181832-b64036f0a8e4/advanced_nego/supervisor_service.go:91:17: constant 3735928559 overflows int

These errors can probably be fixed by having the functions explicitly return int64, I think.

[sijms]

I fix it. can you check if there is any errors

I will also test the driver against x32 system to detect runtime errors

[ipsi]

Cool, builds successfully now - thanks!